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260 Matching Results
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Panoramic image of a walkway at the Apogee Stadium.
Photograph of a walkway at the Apogee Stadium on the University of North Texas (UNT) campus in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Panoramic image of a cul de sac in the Denia neighborhood in Denton, Texas
Photograph of a cul de sac or dead end in the Denia neighborhood in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Panoramic image of construction equipment near Interstate 35 in Denton, Texas
Photograph of construction equipment related to the widening of Interstate 35 in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Panoramic image of construction equipment near Interstate 35 in Denton, Texas.
Photograph of construction and construction equipment near Interstate 35 in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Panoramic image of construction near I35 in Denton, Texas
Photograph of construction on a side street that is related to the expansion of Interstate 35 in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Panoramic image of the entrance to the field of Apogee Stadium.
Photograph of the entrance to the field of Apogee Stadium on the University of North Texas (UNT) campus in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Panoramic image from the middle of a residential street in Denton, Texas.
Photograph from the middle of the street in the Denia neighborhood in Denton, Texas. This photograph is a stitched 360-degree panoramic image.
Date:
August 23, 2016
Creator:
Phillips, Mark Edward
Object Type:
Photograph
System:
The Portal to Texas History
Denton Record-Chronicle (Denton, Tex.), Vol. 115, No. 21, Ed. 1 Thursday, August 23, 2018
Daily newspaper from Denton, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2018
Creator:
McCrory, Sean
Object Type:
Newspaper
System:
The Portal to Texas History
Generating Ultrashort Coherent Soft X-ray Radiation in Storage Rings Using Angular-modulated Electron Beams
A technique is proposed to generate ultrashort coherent soft x-ray radiation in storage rings using angular-modulated electron beams. In the scheme a laser operating in the TEM01 mode is first used to modulate the angular distribution of the electron beam in an undulator. After passing through a special beam line with non-zero transfer matrix element R{sub 54}, the angular modulation is converted to density modulation which contains considerable higher harmonic contents of the laser. It is found that the harmonic number can be one or two orders of magnitude higher than the standard coherent harmonic generation method which relies on beam energy modulation. The technique has the potential of generating femtosecond coherent soft x-ray radiation directly from an infrared seed laser and may open new research opportunities for ultrafast sciences in storage rings.
Date:
August 23, 2010
Creator:
Xiang, D. & Wan, W.
Object Type:
Article
System:
The UNT Digital Library
A 3-dimensional theory of free electron lasers
In this paper, we present an analytical three-dimensional theory of free electron lasers. Under several assumptions, we arrive at an integral equation similar to earlier work carried out by Ching, Kim and Xie, but using a formulation better suited for the initial value problem of Coherent Electron Cooling. We use this model in later papers to obtain analytical results for gain guiding, as well as to develop a complete model of Coherent Electron Cooling.
Date:
August 23, 2010
Creator:
Webb, S. D.; Wang, G. & Litvinenko, V. N.
Object Type:
Article
System:
The UNT Digital Library
Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar Power
Worldwide interest in the deployment of photovoltaic generation (PV) is rapidly increasing. Operating experience with large PV plants, however, demonstrates that large, rapid changes in the output of PV plants are possible. Early studies of PV grid impacts suggested that short-term variability could be a potential limiting factor in deploying PV. Many of these early studies, however, lacked high-quality data from multiple sites to assess the costs and impacts of increasing PV penetration. As is well known for wind, accounting for the potential for geographic diversity can significantly reduce the magnitude of extreme changes in aggregated PV output, the resources required to accommodate that variability, and the potential costs of managing variability. We use measured 1-min solar insolation for 23 time-synchronized sites in the Southern Great Plains network of the Atmospheric Radiation Measurement program and wind speed data from 10 sites in the same network to characterize the variability of PV with different degrees of geographic diversity and to compare the variability of PV to the variability of similarly sited wind. The relative aggregate variability of PV plants sited in a dense 10 x 10 array with 20 km spacing is six times less than the variability of a single …
Date:
August 23, 2010
Creator:
Mills, Andrew & Wiser, Ryan
Object Type:
Report
System:
The UNT Digital Library
Optimization of Dynamic Aperture of PEP-X Baseline Design
SLAC is developing a long-range plan to transfer the evolving scientific programs at SSRL from the SPEAR3 light source to a much higher performing photon source. Storage ring design is one of the possibilities that would be housed in the 2.2-km PEP-II tunnel. The design goal of PEPX storage ring is to approach an optimal light source design with horizontal emittance less than 100 pm and vertical emittance of 8 pm to reach the diffraction limit of 1-{angstrom} x-ray. The low emittance design requires a lattice with strong focusing leading to high natural chromaticity and therefore to strong sextupoles. The latter caused reduction of dynamic aperture. The dynamic aperture requirement for horizontal injection at injection point is about 10 mm. In order to achieve the desired dynamic aperture the transverse non-linearity of PEP-X is studied. The program LEGO is used to simulate the particle motion. The technique of frequency map is used to analyze the nonlinear behavior. The effect of the non-linearity is tried to minimize at the given constrains of limited space. The details and results of dynamic aperture optimization are discussed in this paper.
Date:
August 23, 2010
Creator:
Wang, Min-Huey; Cai, Yunhai & Nosochkov, Yuri
Object Type:
Article
System:
The UNT Digital Library
Dispersion relations for 1D high-gain FELs
We present analytical results for the one-dimensional dispersion relation for high-gain FELs. Using kappa-n distributions, we obtain analytical relations between the dispersion relations for various order kappa distributions. Since an exact solution exists for the kappa-1 (Lorentzian) distribution, this provides some insight into the number of modes on the way to the Gaussian distribution.
Date:
August 23, 2010
Creator:
Webb, S. D. & Litvinenko, V. N.
Object Type:
Article
System:
The UNT Digital Library
XFEL Oscillator Simulation Including Angle-Dependent Crystal Reflectivity
The oscillator package within the GINGER FEL simulation code has now been extended to include angle-dependent reflectivity properties of Bragg crystals. Previously, the package was modified to include frequencydependent reflectivity in order to model x-ray FEL oscillators from start-up from shot noise through to saturation. We present a summary of the algorithms used for modeling the crystal reflectivity and radiation propagation outside the undulator, discussing various numerical issues relevant to the domain of high Fresnel number and efficient Hankel transforms. We give some sample XFEL-O simulation results obtained with the angle-dependent reflectivity model, with particular attention directed to the longitudinal and transverse coherence of the radiation output.
Date:
August 23, 2010
Creator:
Fawley, William; Lindberg, Ryan; Kim, K. J. & Shvyd'ko, Yuri
Object Type:
Article
System:
The UNT Digital Library
Justice Department''s Role in Cyber Incident Response
This report outlines the federal framework for cyber incident response, highlighting the Department of Justice's (DOJ's) role in this response. It also discusses challenges for federal law enforcement and potential policy issues for Congress.
Date:
August 23, 2017
Creator:
Finklea, Kristin
Object Type:
Report
System:
The UNT Digital Library
Labor Day Speech Resources: Fact Sheet
This report provides Members of Congress with resources for information and speech samples for use at Labor Day celebrations.
Date:
August 23, 2017
Creator:
Cervantes, Valerie S.
Object Type:
Report
System:
The UNT Digital Library
The Patient Protection and Affordable Care Act's (ACA's) Transitional Reinsurance Program
This report provides an overview of one of the three risk-mitigation programs of the Patient Protection and Affordable Care Act, the transitional reinsurance program. The first section of the report provides background information on reinsurance and the ACA risk-mitigation programs. The second section describes the components of the transitional reinsurance program, as well as implementation of and experience with the program. The third section discusses questions regarding the scope of HHS's authority to administer the transitional reinsurance program, including those raised by a 2016 Government Accountability Office report. Finally, the report includes a table in the Appendix that summarizes key aspects of the transitional reinsurance program.
Date:
August 23, 2017
Creator:
Uberoi, Namrata K. & Liu, Edward C.
Object Type:
Report
System:
The UNT Digital Library
Brownwood Bulletin (Brownwood, Tex.), Vol. 113, No. 236, Ed. 1 Friday, August 23, 2013
Weekly newspaper from Brownwood, Texas that includes local, state and national news along with advertising.
Date:
August 23, 2013
Creator:
Stuckly, Derrick
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 137, No. 14, Ed. 1 Thursday, August 23, 2012
Weekly newspaper from Albany, Texas that includes local, state and national news along with advertising.
Date:
August 23, 2012
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Aransas Pass Progress (Aransas Pass, Tex.), Vol. 108, No. 34, Ed. 1 Wednesday, August 23, 2017
Weekly newspaper from Aransas Pass, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2017
Creator:
Martinez, Norma L.
Object Type:
Newspaper
System:
The Portal to Texas History
Cooper Review (Cooper, Tex.), Vol. 132, No. 34, Ed. 1 Thursday, August 23, 2012
Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2012
Creator:
Roller, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
The McGregor Mirror and the Crawford Sun (McGregor, Tex.), Vol. 108, No. 34, Ed. 1 Thursday, August 23, 2012
Weekly newspaper from McGregor, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2012
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Canton Herald (Canton, Tex.), Vol. 129, No. 38, Ed. 1 Thursday, August 23, 2012
Weekly newspaper from Canton, Texas that includes local, state and national news along with some advertising.
Date:
August 23, 2012
Creator:
Vaughan, Julie
Object Type:
Newspaper
System:
The Portal to Texas History
Rains County Leader (Emory, Tex.), Vol. 125, No. 11, Ed. 1 Tuesday, August 23, 2011
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2011
Creator:
Hill, Earl Clyde, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History